Mill.



Patented Aug. 15, 1911.

MILL.

APPLICATION FILED DEO. 15, 1910.

A. MERGKENS.

www

W JeJ.-

AUGUST MERCKENS, or NEW YORK, N. Y.

MILL. i

To all whom it 'may concern:

Be 1t known that I, AUGUST MERckEN-s, aj

citizen 'of the United States, residing in the borough of Brooklyn, county of Kings, City and State of New York, have invented an Improvement in Mills,'of which the folloning `is a specification.

My invention relates to mills. and particularly to mills for grinding chocolate and similar materials, although the use to which my improved mill maybe pnt is not to be understood as being limited to grinding chocolate, as it is equally adapted for grinding any mineral or fiber substances in lio,-

uids or oils, such for example as paints or inks.

The principal object of my invent-ion is theprovision of a mill in which a simultaneous feeding and pulverizing of the material to be ground is effected by the same members of the apparatus, whereby the time employed in grinding is materially shortcned without decreasing the efficiency of the` mill as a grinder.

In carrying out my invention, I preferably employ a base, 'a container to receive the material to be ground, a grinder within the container, means whereby the grinder is revolved or turned wit-hin the container, and, means whereby in the turning of the grinder, the same is raisedand lowered .to'

alternately recede or move away from and' then back into contactvith the walls ot' the container, as will be hereinafter more particularly described.

The drawing illustrates a central vertical cross-section of a mill comprising my present. invention.

Referring Vto the drawing, my improved mill preferably comprises a base or foundation 10 upon which is mounteda container having al conical wall 12 mounted upon the container hase'lll, which latter is secured in any desired manner to thc base or foundation 10. Cminectcd to or made integral with the base'11 is a bearing 13 adapted to receive the lower end of the shaft or spindle 14, the upper portion of which passes through and is journalcd in a bearing 15 made in a' cross-piece or brace llitting within the upper portion of the conical walls 12 of the contai-ner.

- rlheuppcr end of the shaft 14 is provided with a pulley 17, Vby whichv as will be understood, by means of a belt 18 or other- Specification of Letters Patent.

Patented' Aug. 15,1911.

cross-piece or brace 16 beingprovided with openings 19, through which the material to be ground may be passed` tothe interior of the container.

On the shaft 14 and within the conical walls 12 of the container, I employ a grinder 20. As illustrated, this grinder is hollow, is provided with a hub 21 through which the shaft 14 passes, and is connected to the shaft 14 by set` screws 22; as will be understood, the grinder 20 may, to have the required weight, b made solid, or the walls thereof be made of any thickness and the same may be secured tothe shaft 14 in any manner knownto the art. The walls of the grinder 2O however, which come adjacent to the conical walls 12 of the container, are made to ta. er at the same angle as the walls 12 of the container, so that when the grinder is lowered, the surfaces of these inclined walls of the grinder coincide with the inner surfaces of the walls 12 of the container. Surrounding the Abearing 13, the base 0r foundation '10 1s provided with a rib, or flange 23, having oppositely disposed raised and depressed portions.

Fixed on the shaft 14 is a crossarmv 24 extending from opposite sides of a'hub 25, the same being secured t0 the shaft 14 by a set screw 26 or otherwise. At the eX- tremitics of the cross-arm 24, there are axles upon .which rollers 27 are'mounted, the rollers 27 being adapted to run on the edge of the rib 23 when the shaft 14 is turned, so that alternately the shaft 14 and grinder 20 are raised and lowered to permit the material to be ground to be more readily fed `to and through the space between the adjacent surfaces of the grinder and the conical walls 12 of the container, and to return the `grinder to its lowered position, so that these adjacent surfaces would come into contact were it not for theI intervening material which through the turning of the grinder,

to pass from the mill by directing its cour through the annular space 29 in the base or foundation 10. A

I claim as my invention:

l. A mill comprising a base, a container, 'a grinder', means for turning the grinder Within the container, and 'means actuated by the turning of the'4 grinder, to cause the latter to move entirely away from and out of contact Witlithe walls ofy the container. and to return in like manner into contact with the said Walls.

2.' A mill comprising a base, a container having conical Walls, a grinder having inclined Walls, a shaft passing through the container and upon which the grinder is mounted, bearings for the shaft, means for turning the shaft to revolve the grinder, and means actuated by the turning of the shaft to' cause the shaft and grinder tomove longitudinally so that the grinder ismoved en-y tirely away from the walls of the container and returned to position so that the entire grinding surface of the grinder is in contact With the Walls of the container.

3. A mill comprising a base, a container having conical Walls, a grinder having in- -clined Walls, a shaft passing through the container and upon which the said grinder is mounted, bearings for the shaft, means whereby the shaft is turned t'o revolve the grindeiya rib connected to the said base and having alternately raised and depressed portions, and means connected with the shaft and ',copcrating With. the said raised and depressed portions of the rib to cause the said shaft to be raised and lowered when turned so as to move the said grinder away from and to return the saine into contact with the conical walls of the container. a

4. A mill comprising a base, a container having conical walls, a grinder having in` clined Walls, a shaftpassing through the container and upon which the said grinder is mounted,y bearings for the shaft, means whereby the shaft is turned to revolve the grinder, a rib connected to the said base and having alternately raised and depressed portions, a cross-arm connected to said shaft, and rollers mounted at the extremities of the said cross-arm and adapted to run on the alternately raised and depressed portions of the edge of the rib to raise and lower the said shaft when the saine is revolved, whereby the said grinder' is alternately moved away from and returned into contact with the conical walls of said container.

Signed by me this 10th day of Dece'iiiber, 1910. 

